Patent DE-10027036-A1 (DE)
Title: Bearing support disk for an open-end spinning rotor shaft is composed of a pair of spaced part-disks with structured passage openings to generate a cooling air stream at the rotor and shaft
Inventor: SONNTAG ECKHARD
IPC: D01H1/16
Filed: 2000-06-02
Abstract: The support disk, as part of the bearing mounting system for the rotor shaft (4) of an open-end spinning rotor, is composed of a pair of two part-disks (1,2). At least one part-disk has a concentric base body and a concentric plastics bandage as a damping ring (3). The total support disk surface is at least three times a side surface. The open-end spinning rotor shaft support part-disks have the same or different outer diameter. The part-disks are spaced apart, to form a hollow zone (11) between them. At least one part-disk has axial passage openings (12), for air to be drawn through by suction as the disks rotate. The passage openings are set to form part-segments (13) to give a mutual support and stabilizing action. The air flow and noise are set by the structure of the axial passage openings with their number, position, dimensions and shape. As the disk structure rotates, an air flow is developed to give a forced convection at the inner surfaces (6,7), and a radial air flow is generated at the axial center which is blown radially outwards. The width of the part-disks and the gaps between them can be adjusted. The part-disks can be assigned different functions e.g. one part-disk applies traction forces to the rotor shaft while the other part-disk acts only as a support. The disk surfaces in contact with the rotor shaft can have different elastomer and friction characteristics. One part-disk can take up radial and tangential forces, while the other part-disk takes up axial forces. At least the base body of at least one part-disk is of a polymer or metal or industrial ceramic material. At least one part-disk can be without a damping ring bandage. A groove is around the circumference of a part-ring of the damping ring bandage of at least one part-disk. The axial passage openings are also used to measure the disk rotary speed. One part-disk can be structured as a reflector, at least partially. The damping ring bandage in contact with the rotor shaft is chamfered on both sides. The part-disks can be produced as a single disk component, to be divided into two parts. Or they can be produced separately, for assembly together into a split supporting disk. An Independent claim is included for a rotor shaft support disk assembly, with a support disk to drive the rotor shaft and where an identical or mirror image support disk structure is at the rotor shaft of each spinning station in an open-end spinning machine. Preferred Features: The side surfaces of a plastics part-disk is covered with an electrically conductive coating with a surface resistance of  <= 10E?+10 (Ohm). Each part-disk can be exchanged separately. Preferably at least two cooling disk pairs are at a spinning station with axial displacement but not necessarily in an axial running position against each other. The base body is of a material with a thermal conductivity of  <= 5 W/mK. The part-disks are positioned (31) against each other while keyed against rotation. The passage openings are positioned to reduce wind noise to a minimum.